Shulou(Shulou.com)06/03 Report--

There are mainly two kinds of midamble,default midamble and common midamble.

First of all, let's talk about common midamble. The use of common midamble is that the common midamble allocation strategy is sent to UE in the process of high-level physical channel configuration, and then a common midamble may be assigned by L1 to all physical channels in a downlink slot.

Second, if it is not sent through a physical channel configuration, the default midamble,UE needs to obtain its own midamble from the assigned channelisation codes, and there is only one midamble for the use of a primary and a series of secondary channelisation codes. The association between midamble and channelisation codes has a special correspondence in the table, and all secondary channelisation codes use the same midamble, like the channelisation codes associated with primary.

For details, see 25.221 5.6.1.2

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